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sudut MNL = 65 derajat
sudut KNL = 55 derajat
sudut KLN = 55 derajat
sudut LMN 50 derajat
LKO = NKO = 35
NKL = LKO + NKO = 35 + 35 = 70
KNO = KLO = 180 - 70 : 2 = 55
NML = 180 - 65 - 65 = 50
maaf kalau ada kesalahan ^-^